on-living, of the waters superjacent to the seabed and of
the seabed and its subsoil, and with regard to other activities for the
economic exploitation and exploration of the zone, such as the
production of energy from the water, currents, and winds; jurisdiction
with regard to the establishment and use of artificial islands,
installations, and structures; marine scientific research; the
protection and preservation of the marine environment; the outer limit
of the exclusive economic zone shall not exceed 200 nautical miles from
the baselines from which the breadth of the territorial sea is
measured.

continental shelf - the UNCLOS (Article 76) defines the continental
shelf of a coastal state as comprising the seabed and subsoil of the
submarine areas that extend beyond its territorial sea throughout the
natural prolongation of its land territory to the outer edge of the
continental margin, or to a distance of 200 nautical miles from the
baselines from which the breadth of the territorial sea is measured
where the outer edge of the continental margin does not extend up to
that distance; the continental margin comprises the submerged
prolongation of the landmass of the coastal state, and consists of the
seabed and subsoil of the shelf, the slope and the rise; wherever the
continental margin extends beyond 200 nautical miles from the baseline,
coastal states may extend their claim to a distance not to exceed 350
nautical miles from the baseline or 100 nautical miles from the 2500
meter isobath; it does not include the deep ocean floor with its
oceanic ridges or the subsoil thereof.

exclusive fishing zone - while this term is not used in the UNCLOS,
some states (e.g., the United Kingdom) have chosen not to claim an EEZ,
but rather to claim jurisdiction over the living resources off their
coast; in such cases, the term exclusive fishing zone is often used;
the breadth of this zone is normally the same as the EEZ or 200
nautical miles.

Median age: This entry is the age that divides a population into two
numerically equal groups; that is, half the people are younger than
this age and half are older. It is a single index that summarizes the
age distribution of a population. Currently, the median age ranges from
a low of about 15 in Uganda and Gaza Strip to 40 or more in several
European countries and Japan. See the entry for "Age structure" for the
importance of a young versus an older age structure and, by
implication